20089747 has 2 divisors, whose sum is σ = 20089748. Its totient is φ = 20089746.

The previous prime is 20089711. The next prime is 20089757. The reversal of 20089747 is 74798002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20089747 - 2¹⁵ = 20056979 is a prime.

It is not a weakly prime, because it can be changed into another prime (20089757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10044873 + 10044874.

It is an arithmetic number, because the mean of its divisors is an integer number (10044874).

Almost surely, 2^20089747 is an apocalyptic number.

20089747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20089747 is an equidigital number, since it uses as much as digits as its factorization.

20089747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 20089747 is about 4482.1587432843. The cubic root of 20089747 is about 271.8471739170.

The spelling of 20089747 in words is "twenty million, eighty-nine thousand, seven hundred forty-seven".